Penthexhexium (Phh)

Penthexhexium is the systematic name of the theoretical 566ú element in the periodic table with a symbol of Phh and atomic number of 566. Penthexhexium, also known as element 566, has cúig chéad seasca a sé protons in its nucleus, and cúig chéad seasca a sé electrons in its shells.